hhhhh ok /you don t have a f.c.b.ook this is very good/ if you are from annaba-i m from ben mhidi 23 km of annaba... ok i will send the articl by el jelfa.....hhhhh....but when i complet it /thnx/.when you need something i m here i m very good in mat sience...physic...ect/ i have bac 15.92/